Well-known carpet distributor Konami has disabled the Metal Gear Online beta on PC following the discovery of an exploit that allowed players to get free MB coins, the in-game currency that costs real money.

“Due to a possible exploit, we’ve removed access to the Beta temporarily while a hotfix is being prepared,” Konami community manager Robert Peeler wrote on the Steam forums. “Once the issue is addressed we’ll provide access to the Beta once again.”

The Metal Gear Online betalaunched on PC last night, and players immediately discovered that they could buy MB coins without getting charged, which is obviously a serious problem for Konami’s beancounters. We’ll let you know when the beta’s back online.

You can reach the author of this post at jason@kotaku.com or on Twitter at @jasonschreier.